Apparatus for recovering metal from blast-furnace dust.



H. G. PARKER.

APPARATUS FOR REGOVERING METAL PROM BLAST FURNACE DUST.

APPLICJA-TION FILED NOV. 16, 1910. I 987,739. Patented Mar.28,1911

2 SHEETS-SHEET 1. Zia 3 1* HHHHH WWI l 5 g WITNESSES I Q H. G. PARKER. APPARATUS FOR REGOYERING METAL PROM BLAST FURNACE DUST.

APPLICATION FILED NOV. 15, 1910. 987,739, Patented Mar. 28, 1911.

2 SHEETS-SHEET 2.

WITNESSES N [N VEN T 01? HARRY G. PARKER, F IRONTON, OHIO.

- APPARATUS FOR REOOVEBING METAL FROM BLAST-F RNAGE DTTST.

"Specification of Letters Patent. Patented Ma -.1911.

Application and November 15, 1910. Serial No. 592,496.

To all whom it may concern."

Be it known that I, HARRY O. PARKER, a

citizen of the United States, residing in.

Ironton, in the county of Lawrence and State of Ohio, have invented certain new and useful Improvements in Apparatus for- Recovering Metal from Blast-Furnace Dust,

of which the following is a specification.

The present invention relates to 'an apparatus for recovering the metal contained in. the dust expelled from blast furnaces when such furnaces are opened for charging.

During the operation of blast furnaces those lighter particles or dust of the ore to be reduced which do not reach thesphere of the bosh'es are, through the pressure incident to the blast, blown out of the furnace through the down-comer and into a suitable receiver. At appropriate periods the contents of thesereceivers are removed and subjected to a caking orbriqueting process considerable quantity of the ore bearing dust incident to the great pressure within the furnace and heretofore the recovery of metal contained in this product has been neglected.

It is thereforethe purpose of the present invention to recover this element and-condi- .tion the same for treatment throughthe'regular blast furnace action.

Summarily stated the invention consists in certain means for subjecting the ore bearing dust to the heating action ofan intense flame, but out of direct contact therewith, whereby to not disturb the material, which, as just stated is in a too finely divided condition to withstand the blast; but to cause the metallic particles existingin the dust to sinter and adhere.

' The accompanying drawin s disclose the apparatus and in the severa views shown therein: Figure 1 is a side elevation of the kiln partly in section. Fig. 2 is a vertical sectional view thereof taken at right angles to the View shown in Fig. 1,'and Fig. 3 is a plan view in section taken on the line 3--3 0 ig. 1. I Referring to the structure in further detail, land 2 designate the end and side walls of the kiln, and 3 the arched roof thereof,

and within the side walls 2 are arranged a series of fire-places 4 having the usual grates 5 and ash-pits 6. The fire-places 4 are extended well within the kiln chamber and have each a vertically disposed flue 7. The several flues 7 terminate at a point substantially on a line with the upper edges of the walls 1 and 2 (see Fig. 1). Cooperating with each of the fiues 7 and disposed ad acent thereto is a flue 8. Said flues 8 are constructed similar tothe flues 7- and constitute the downward passes for the products of combustion issuing out of the fines 7. All of the fiues 8 terminate below the ground level of the kiln and communicate in series with conduits 9 which lead to the draftstacks, not shown in the drawing. Each of the conduits 9 is provided with a damper 9 for regulating the draft.' The series of flues 7 and 8 provide within the chamber a plurality of intercommunicating series, of receptacles adapted to contain the finely divided ore dust which is to be reduced, and access within said receptacle is made through the arch doors 10. The floor 11 of the reducing cham-' her is on the same level'as that of the fireplace grates.

In operation the several receptacles of the reducing chamber are charged with the ore dust and the fire-places fired. I The products of combustion of thefires take substantially that course indicated by the arrows in Fig. 2, thus subjectin tially the full e ciency of the several furnaces; and it is to be noted that with this arrangement the ore dust is not brought into direct contact with the heated currents which as heretofore pointed out, the ore dust is too fine to withstand.

What is claimed is 1. A. furnace for sinterin'g ore dust expelled from blast-furnaces comprising a closed chamber having a series of communicating receptacles for the ore dust, a plurality of fire places arranged along either products of combustion in the manner speci- 2. A furnace for sintering ore dust expelled from blast furnaces comprising a closed chamber having a series of communicating: receptacles for the ore dust, said rethe ore dust to substaneach 01'' said flues comprising two independent and vertically disposed passageways open ceptacles being vertically disposed and open 1 receptacles, 'anrl an outlet for one of said 10 fines.

The foregoing specification signed at Iront'on, Ohio, this 21st day of October, 1910.

I HARRY o. PARKER.

In presence of- MORRISON W. Roaming; EDITH HENR at the tops thereof; a pluralityof fire-places arranged along either side of the chamber and adjacent thereto, and having each a flue,

at the top and adapted to convey the products of combustion in a contim'louscurrent for approximately twice the lengthof Said A p v 

